I highly recommend those quests that doesn′t appear in your journal. Like when you find a clue and start following it. There is a neat one at Pale Pass, and another one involving a sword on a ruin.
These quests are the best as you have to think for yourself. Unfortunately I missed out on the latter as I failed to recognize it as a quest. I was just passing by to somewhere else and didn′t take my time
On note, there are more than those two